Use abstract wording

People do not need to know that this will be implemented as an
exception.

lib/Doctrine/DBAL/Schema/Column.php

@@ -122,7 +122,7 @@ class Column extends AbstractAsset
                 // next major: throw an exception
                 @trigger_error(sprintf(
                     'The "%s" option is not supported,'.
-                    ' setting it is deprecated and will cause an exception in 3.0',
+                    ' setting it is deprecated and will cause an error in 3.0',
                     $name
                 ), E_USER_DEPRECATED);
 

tests/Doctrine/Tests/DBAL/Schema/ColumnTest.php

@@ -58,7 +58,7 @@ class ColumnTest extends \PHPUnit\Framework\TestCase
 
     /**
      * @group legacy
-     * @expectedDeprecation The "unknown_option" option is not supported, setting it is deprecated and will cause an exception in 3.0
+     * @expectedDeprecation The "unknown_option" option is not supported, setting it is deprecated and will cause an error in 3.0
      */
     public function testSettingUnknownOptionIsStillSupported() : void
     {